A **** with poor service

If there was a 0 start rating i will give it to this business, i took a month-to-month contract with MTN. Upon their delivery they didn't deliver a sim card with the router. @MTN said i need to communicate with Mondo to have it delivered (I still don't i understand how i was the one who was supposed to resolve this with Mondo while i took a contract with MTN?). To my shock Mondo requested that i go to MTN store for a sim swap that cost R150 which they will refund me since it was their mistake. I then forwarded the proof of payment to Mondo regarding the transaction to this day they haven't refunded me. i attempted to cancel my contract with this business the agent told me to take the router instore, which i then asked if i am going to be refunded for the upcoming month that i paid for? Still waiting for a clear response, seems like i will pay for nothing then. which i had to stop the debit. What a poor service.